Preparation and luminescent characteristics of Eu3+-activated MgxZn1−xGa2O4 nanocrystals

Autor:	Yu-Chung Chen, Bin-Siang Tsai, Yen-Hwei Chang
Rok vydání:	2006
Předmět:	Materials science Photoluminescence Mechanical Engineering Inorganic chemistry Doping Metals and Alloys Analytical chemistry Phosphor General Medicine Gallate law.invention Nanocrystal Mechanics of Materials law Materials Chemistry Crystallization Electric dipole transition Luminescence Excitation
Zdroj:	Journal of Alloys and Compounds. 407:289-293
ISSN:	0925-8388
DOI:	10.1016/j.jallcom.2005.06.021
Popis:	Nanometer-scale Eu-doped MgxZn1−xGa2O4 phosphor powders have been synthesized by sol–gel process. The crystallization behaviors were investigated as well as the excitation and photoluminescence spectra employed to study the luminescence properties of Eu3+ in Mg–Zn mixed gallate. The grain size gradually decreases from 32.5 to 8.6 nm as Mg content increases. The excitation spectrum varies with the composition and consists of a weak charge transfer band and intense f–f transitions. Under the excitation at 394 nm, the Eu-doped MgxZn1−xGa2O4 phosphors display strong red luminescence at about 612 nm belonging to 5D0 → 7F2 electric dipole transition. Both the emission intensity and life-time increase with the arising concentration of Mg.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::47facd16965d83b934f948959d1661cd https://doi.org/10.1016/j.jallcom.2005.06.021 Zobrazit plný text záznamu Full Text from ScienceDirect